US3700399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of dyeing textile fibers with an anionic dyestuff in the presence of a quaternary ammonium salt
Assignee: Teijin Ltd
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Filing: 1970-04-13
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Granted: 1972-10-24
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Expires: 1990-04-13
Abstract
Abstract IN THE DYEING OF HYDROPHOBIC FIBERS SUCH AS POLYVINYL CHLORIDE FIBER, POLYACYLONITRILE FIBER, MODIFIED POLYESTER FIBER AND CELLULOSE ACETATE FIBER WITH AN ANIONIC DYESTUFF, A METHOD OF FURTHER ENHANCING THE DYEABILITY OF THOSE OF THE SAID FIBERS WHICH HAVE IN THEMSELVES A DYEING SITE FOR AN ANIONIC DYESTUFF AND OF MAKING DYEABLE THOSE OF THE SAID FIBERS WHICH HAVE HITHERTO HAD NO DEYING SITE FOR AN ANIONIC DYESTUFF BY THE CONJOINT USE OF A COMPOUND OF THE FOLLOWING FORMULA: R1,R2: LOWER ALKYL OR LOWER ALLYL, Z: BENZYL OR NAPHTHYL (MAY BE SUBSTITUTED), A: BUTYL, OR PHENYL (MAY SUBSTITUTED), X: HALOGEN OR LOWER ALKYL SULFONIC ACID RESIDUE. A-N(+)(-R1)(-R2)-Z X(-)
Inventors
- 👤 Shiro Shimauchi
- 👤 Yuko Kitamura
- 👤 Osamu Iwabuchi
- 👤 Takeshi Matsui
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:23
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/44; D06P1/655; D06P1/66
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |